gas separating installations; machines for generating hydrogen and oxygen by electrolysis; filters for cleaning cooling air, for engines; compressors [machines]; condensing installations; blowing machines for the compression, exhaustion and transport of gases; vacuum pumps [machines]; compressed air pumps; oil filters; air filters for engines; filters being parts of machines or engines

Chemical substances, chemical materials, and chemical preparations for use in purifying water; chemical substances, chemical materials, and chemical preparations for use in separating metals from industrial and mining waste.

Waste water treatment; on-site water purification services; treatment of waste water from industrial processes; purification of industrial waste water; treatment of waste water from generating operations; water treating; water treatment and purification; providing information relating to water treatment; water purification.

Active chemical ingredients and chemical products used in industry; active botanical ingredients and plant extracts for use in industry.